I’m a fully mobile user, so that limits my options. I don’t just want to delete my account but also delete my posts and comments.
I was mostly shitposting but still had some 200k Karma so it could pinch Reddit a bit to remove that but it won’t hurt users or Google search since I wasn’t doing anything ‘productive’ or ‘helpful’.
Log in in the mobile site. Yes, it’s trash, but you can do it through old.reddit.com so it’s a bit more tolerable.
Then use this script. It asks you to “drag” the button because it was made for desktop, but I think that copying it and pasting it in the address bar and then using enter could also work. It’s just javascript.
Then it’s up to you; if you just want to delete it, it should be rather obvious what to do, based on the options of the script. If however you want to replace your content with random gibberish, I got a tutorial for you here.
Sorry for not being able to help you further than that, it’s just that I usually do this sort of stuff through a computer. But hopefully people who use mobile more often can chime in.